Published
by Consul Books, this was successful enough to have been reprinted by
November of 1963. It cost half a crown..

From the back cover:"Britain's most successful television
thriller series - THE AVENGERS. (A.B.C. TELEVISION). Based on the
television series which has thrilled millions, Douglas Enefer's new novel,
presenting those same characters you have come to know on the television screen,
brings the kind of reading pleasure that is only rarely available. Those
characters who have thrilled millions on television, now between the covers of a
thrill-a-page novel."

Review (of sorts):Now this is a treat. Actually, I'm lying as I've
never managed to read all the way through this book. Even in those
dark days when no Honor Blackman episodes were available to watch.
It's got Steed in it, it's got Mrs Gale in it, it's even got One-Six in
it, but sadly not Venus Smith. It's also got a character in it
called Margaret Allington, which I presume is a back-handed compliment to
ultra-English crime writer Margery Allingham. It was successful
enough to go to two printings in November 1963, mind you. And
originated here in Swinging Manchester, at 36 Great Russell Street in the
offices of World Distributors Ltd, purveyors of stinking heaps of turgid
60s TV related annuals and paperbacks. This was published under
their adult imprint of Consul and, as the cover shows, cost a whole shiny
half-a-crown. More on Douglas Enefer with the Autumn update.